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Old 31-07-18, 11:24 AM   #1
isutty5
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Default Noisy Cam chain?

(Update: details on page 4. Anyone with similair issue should read, I count myself lucky!)

Hi,

I have an SV650 SK3.

It has about 38k miles on the clock and I've owned since 10k.

Recently I've begun to hear quite a loud ticking from the engine. I'm sure it's the rear cylinder because the noise is more audible at the rear. I've recorded a video so you can listen to the sound.

https://www.youtube.com/watch?v=mkw_2r2de7Y

From what i've gathered, SVs are notorious for having a noisy cam chain.

My mechanic who isn't so familiar with SVs suggested posting to a forum of SV owners who may know more about the common issue.

It certainly isn't anything to do with my valves as the engine runs perfectly and is as happy as always.

My concern is, although SVs can develop noisy cam chains. Is this not a bit too loud? I can here it above my exhaust note. (No baffle).

I need a bit more advice on this as to whether it's ok to leave or if I should get it looked at. I'd rather have someone familiar with SVs look at it so if anyone knows of anyone around the Bury, Greater manchester area who could check it out. I'd appreciate it!

Thank you!

Last edited by isutty5; 07-09-18 at 07:36 AM.
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Old 31-07-18, 12:28 PM   #2
Craig380
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Default Re: Noisy Cam chain?

Personally (and this is just my 10 pence worth) I don't think that is noisy in the video.

My K6S has 29K up (I've had it since 7.5K) and sometimes the camchain tap / rattle is really noticeable, yet other times is utterly silent - and it can go from one to the other in the course of a single ride. I have never been able to find any pattern for it. Doesn't matter if it's hot or cold, has done a long run or a short run, or whatever. It's always done it, ever since I got the bike. So I don't worry about it.

The SV motor is notorious for its mechanical noise, because unlike an inline twin or four-cylinder bike, the SV has double the number of camchains, and it also doesn't have a big chunky cylinder block to dampen mechanical noises. The camchain tunnels are outside the water jacket, right next to the external cylinder wall.
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Old 31-07-18, 12:48 PM   #3
isutty5
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Default Re: Noisy Cam chain?

Thanks for opinion. I just don't know if the video does the noise justice. I mean, the end can has no baffle so it's loud. And at idle, the cam noise is way more noticeable than the exhaust. It maybe gets a bit quieter when warm but other than that, it's always very noticeable.

I can't hear anything but my exhaust when i'm on the throttle but I assume thats because I'm pulling cam chain tight with load?

It just worries me because the tapping of the cam chain was not noticeable maybe 5k miles ago. If it was purely because of how it's built, you'd expect this noise to have always been the case.

Something must have changed.

I have to mention I had the Curvy before this with the same noise occurring at the front cylinder and it ran for another 10k (Before it got stolen).

I just don't want a catastrophic failure happening.

I could go to someone for a full strip and search and they may find nothing, but I'd be out of pocket money wise.

mechanic suggested changing to manual tensioner, but in all honesty I'd rather not push limits of the chain.

Last edited by isutty5; 31-07-18 at 12:54 PM.
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Old 01-08-18, 07:58 AM   #4
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Default Re: Noisy Cam chain?

I too would be concerned if mine was that loud.Here's a couple of sound bites of my 1999 Curvy with 22K on the engine.

First one with original exhaust and second one with the Chinaprovich Slip-on I fitted,

https://app.box.com/file/179198067326

https://app.box.com/file/218563217522

I run Smith and Allen Motorcycle oil and add some Mso2 Moly to my oil.
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Old 01-08-18, 02:26 PM   #5
yorkie_chris
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Default Re: Noisy Cam chain?

If you can be arsed bringing it up to Bacup when I'll be at work I'll have a listen to it but doubt I'll have time to actually work on it

Can't really tell from the video but it does sound suspect.

DO NOT slacken the securing bolts and nip them back up that is an absolutely stupid idea. The tensioner is a ratchet and you will be putting an unknown tension on the camchain.
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Old 04-08-18, 04:32 PM   #6
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Default Re: Noisy Cam chain?

Thanks chris,

I may try taking the tensioner out entirely and checking it out first and give clean etc.

Any idea of cost of new cam chain if this isn't the case.

Cheers.
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Old 05-08-18, 07:13 AM   #7
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Default Re: Noisy Cam chain?

Have a look on here to confirm the correct part numbers:
https://www.bike-parts-suz.com/suzuk...3423217/M/2928

Then use the part numbers to search on Robinson's Foundry for cheaper prices:
https://www.robinsonsfoundry.co.uk/s...sv650xcamchain


130 camchains are 40 and 92 tensioners are 24 at Robinson's.....
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Old 05-08-18, 11:15 AM   #8
Bibio
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Default Re: Noisy Cam chain?

its very uncommon to have to replace a camchain on an SV, in fact i have never heard of anyone who has had too. what does happen is the tensioners get stuck. a few taps with a screwdriver handle sometimes frees then up, if not you need to get new ones or reset them. do not replace the tensioners with manual ones.. there is no need.
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Old 11-08-18, 02:31 PM   #9
isutty5
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Default Re: Noisy Cam chain?

Cheers for the advice guys. I've taken out the tensioner and was fully extended. Not stuck and in perfect working order. Seems to me like cam chain must be worn then right?
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Old 13-08-18, 08:14 AM   #10
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Default Re: Noisy Cam chain?

Cam chain is a big job, I can't remember completely but I think it may mean removing the head.

I did one on a K5 or therabouts. Other option could be a broken cam chain guide/tensioner follower both also very unlikely. You would be able to see these from the top with the cam cover off and the camchain out.
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